Dehydrator for double glazed windows



Dec. '22, 1942. EDWARDS 2,305,957

DEHYDRATOR FOR DOUBLE GLAZED WINDOWS Filed May 6, 1940 Patented Dec. 22,1942 DEHYDRATOR F R DOUBLE GLAZED WINDOWS Harold Edwards, Syracuse, N.Y., assignor to The 0. M. Edwards Company, 1110., Syracuse, N. Y., acorporation of New York Application May 6, 1940, Serial No. 333,452

This inventionrelates to double glazed windows such as are used inrailway cars, buses, etc., and has for its object a dehydrator ordehydrator tube for absorbing the moisture content of the air betweenthe glass panes, also a particularly simple mounting for the tube in thspace between the glass panes and secured to one sash section only whenthe glass panes are held by opposing sash sections.

It further has for its object a dehydrating tube which can be handledwithout liability of the dehydrating material, which is usuallygranular, as activated alumina, from sifting or pouring out through theventilating openings of the tube when the tube is being heldor handledwith the ventilating Openings thereof downward, and also for preventingthe dust from such material from passing through the ventilatingopenings 'out of the tube.

The invention consists in the novel features and in the combinations andeonstructionshereinafter set forth and claimed.

In describing this invention, reference is had to the accompanyingdrawing in which like characters designate corresponding parts in allthe views.

Figure 1 is a fragmentary elevation of a window construction embodyingthis invention.

Figure 2 is an enlarged sectional view on line 2-2, Figure 1.

Figure 3 is a fra mentary isometric view of the sealing strips of thesash, the dehydrating tube assembled therewith, and the mounting for thedehydrating tube. a

Figure 4 is a fragmentary, longitudinal sectional view of thedehydrating tube and one of the mountings therefor.

Figure 5 is a view, similar to Figure 4, of a dehydrator tube embodyingsections with couplings between the sections.

Figure 6 is an end view of one of the mountings for the dehydrator tube.

Figure 7 is a fragmentary, isometric view 01' a modified form of thedehydrator tube.

' I have here shown this invention as embodied in a double glazed windowin which the glass panes are mounted in sash sections which are Iopposed to each other.

and 6 respectively of resilient material, as rubber.

' 4 Claims. (Cl. 189-64) compressible resilient material as rubbersuitably held by each sectiond, 2, and extending between the margins ofthe glass panes. compressible against the margins of the glass panes andalso against each other.

The sash sections I, 2 are clamped toward each other by suitableclamping means designated generally by the numeral l0 and operable bysuitable means, as screws Ii, Figure 1. Usually, the outer sash sectionI, that is, the one toward the outer side or the car body is mounted soas to stay in place when the other sash section 2 is demounted oropened, the inner section 2 being usually the demountable or openablesection, it being demountable or openable for the purpose of givingaccess to the inside of the glass panels for the purpose of cleaningthem, or for renewing the dehydrating material, or for any otherpurpose. The construction of the clamping means l0 per se forms no partof this invention.

The sealing strips 1 and 8 tightly seal the space between the glasspanes 3, 4 against the interchange of air between the panes 3, l and theouter atmosphere outside or inside of the car body.

For the purpose of keeping the air in the space between the glass panes3, 4, as free of moisture as possible, a dehydrator is employed, thisbeing usually mounted along the lower rail of the sash section.

"designates the dehydrator tube which may be of any suitable material,it being usually of thin metal or almuinum. The tube her shown iselliptical in cross section and is formed with ventilating peripheralopenings in one side thereof, these openings being shown as perforationsIS in Figure 3, and as a lengthwise slot H in Figure '7.

l5 designates a granulated dehydrating material, as activated alumina,in the tube, but not completely filling the same so that when the tubeis laid over on one side, there is a space, as at M,

between the top surface of the material and the The ends of thetubeadjacent wall of the tube. are'closed by porous plugs IT. The plugsmay be of gauze or cotton. 1

One of the features 01 this tube is means for preventing the granularmaterial from sitting or pouring out through the perforations 13, orslot ll, when the tube is held with the perforated or slotted sidedownward, or is carried in an upright position. The means here shown isa strip or flap I 8 extending lengthwise of the tube and lying on thegranulated material [5 under the perforations l3, or the slot I 4, sothat when the tube is held in such a manner that the granular I and 8designate respectively sealing strips of 5d material will move, orshift, toward the perfora- These strips are.

tions 13, or the slot ll, the flap or strip I! will cover and close theperforations or the slot.

Another feature of the invention is the mounting for the tube. Thismounting, as here shown, consists of opposing abutments l9 which arepreferably of rubber secured to the sealing strip 1 of the sash section,which is not readily demountable or openable, but unsecured to the othersealing strip 8 of the demountable or openable sash section 2. Theabutments iii are spaced apart, and the ends of the tube are joined tothe tube with a telescoping action. As here shown, porous plugs ll areinset in the ends of the tube a little distance from the extreme ends ofthe tube forming a socket 20 for receiving a reduced end or plug portion2| of the plug. Also, preferably, the abutment is formed with aventilating passage 22 opening through its periphery and through its endadjacent the tube.

For extremely long windows, and to avoid making the tubes extremelylong, the tube may be made up in sections, as seen in Figure 5, andadjacent sections coupled together by a plug coupling 23. These alsohave ventilating passages 24 therein opening into the tube and throughthe periphery of the plug.

By reason oi! the construction of the tube, and particularly by reasonof the flap l8, the granular dehydrating material is prevented fromsifting out of the tube, and hence, the tube does not have to becarefully handled. By reason of the abutments I9 being carried only byone sealing strip, the tube is readily placed in position and removed,and owing to the construction of the tube and of the abutments, and thepassages in the plugs, there is a comparatively free circulation of airthrough the dehydrating material.

What I claim is:

1. A dehydrator for use in double glazed windows comprising a tube forholding a granular dehydrating material partially filling the tubewhereby the material is capable of shifting in the tube, the tube beingformed with peripheral ventilating openings and closure means within thetube and operable by the shifting of the material under the action ofthe gravity weight of the material to close said openings when the tubeis held with the openings directed other than upward.

2. A dehydrator for use in double glazed windows comprising a tube forholding a dehydrating material and formed with peripheral ventilatingopenings in one longitudinal side thereof, and a freely movable flapextending lengthwise of the tube within the same and overlying thedehydrating material therein partially filling the tube, the flapserving to close said openings when the partially filled tube is held inany position except when said side with .the perforations is upward, andto open said perforations when the tube is positioned with theperforated side upward. V

3. The combination with a double glazed window comprising opposing sashsections, each having means for supporting a glass pane, and Sealingmeans between the margins of the glass pane comprising strips individualto each sash section, and the sealing strips abutting against eachother, and means for clamping one section toward the other, 'whereby oneof the sections is demountable from the other; or opposing spaced apartabutments secured to the sealing strip 01' one sash section andunsecured to the other sealing strip, and a dehydrator located betweenthe abutments and held in position thereby, the dehydrator comprising atube for receiving a dehydrating material, and coacting at its ends withthe abutments to be held in position.

comprising strips individual to each sash section,

and the sealing strips abutting against each other, and means forclamping one section toward the other, whereby one of the sectionsisdemountable from the other; of opposing spaced apartabutments secured tothe sealing strip of one sash section and unsecured to the other sealingstrip, and a dehydrator including a tube for receiving a dehydratingmaterial located between the abutments and held in position at its endsby the abutments, one of the abutments having a passage opening from theexterior thereof into the end of the tube.

HAROLD EDWARDS.

